Withdrawal Research Design

Treatment research follows several levels of sophistication. At the most basic level, case studies describe an intervention and how the individual progressed, providing a rich, in-depth description of the intervention. However, these kinds of studies do not include any controls and therefore cannot lead to conclusions about causality for the benefits of the described intervention. If a treatment appears promising from a case study, often a researcher will proceed to implement a design with a bit more experimental control.

Withdrawal designs, a type of single-subject design (also called N of 1 design or single-case design), refer to research designs in which a treatment component is applied and later removed to evaluate the expected causal effect of the intervention, and it would be the logical next step ...

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